gpu: nvgpu: Allow channel free to be forced

Allow forced channel freeing. This is useful when the driver is
being cleaned up and the gk20a_wait_until_counter_is_N() could
potentially hang.

Bug 1816516
Bug 1807277

Change-Id: I711f5f3f6413d0bb30b4857e785ca3b504b494ee
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: http://git-master/r/1250022
(cherry picked from commit e132d0e5ae77d758680ac708622a4883bbd69ba3)
Reviewed-on: http://git-master/r/1261918
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/channel_gk20a.h b/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
index 0ad1bbaa..ba9f332d 100644
--- a/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
+++ b/drivers/gpu/nvgpu/gk20a/channel_gk20a.h
@@ -226,6 +226,7 @@ int gk20a_init_channel_support(struct gk20a *, u32 chid);
 
 /* must be inside gk20a_busy()..gk20a_idle() */
 void gk20a_channel_close(struct channel_gk20a *ch);
+void __gk20a_channel_kill(struct channel_gk20a *ch);
 
 bool gk20a_channel_update_and_check_timeout(struct channel_gk20a *ch,
                 u32 timeout_delta_ms, bool *progress);